The SEC filed an insider trading action in U.S. District Court for the Northern District of Texas against Donald A. Erickson, former audit committee chairman and a former director of Magnum Hunter Resources, Inc. (MHR). The Commission alleges that Erickson engaged in unlawful insider trading in the securities of MHR ahead of the January 26, 2005 announcement of merger between MHR and Cimarex Energy Company.